painstaking

Acting with, showing, or involving great care and attention. synonym: meticulous.

Attended by difficulties; arduous.

The taking of pains; assiduous and careful labor.

That takes pains or trouble; characterized by close, careful, assiduous, or conscientious application or labor; industrious; laborious and careful: as, a painstaking person.

Careful in doing; diligent; faithful; attentive.

The act of taking pains; carefulness and fidelity in performance.

Carefully attentive to details; diligent in performing a process or procedure.

The application of careful and attentive effort.

characterized by extreme care and great effort